Tie stitching machine



R. NAFTALI E1 AL 3 5 'T'IE STITCHiNC MACHINE May 19, 1942.

Original Filed March ll, 1937 2 Sheets-Sheet l INVENTORS RUDOLF NAFTALIVALENTINE NAFTALI 15 HERY NAFTALI,

ATTORNEY- May 1942' I R. NAFTALI EI'AL TIE STITCHING MACHINE OriginalFiled March 11, 1957 2 sh ets-sheet 2 INVENTORS lzu'boLF NAFTALIVALENTINE NAFTALI B HENRZ NAFTALJ '5 AT Y i Patented May 19, 1942 PATENTOFFICE,

2,283,691 rm s'rrrcnmc MACHINE Company, New York, N. Y.,

New Jersey a corporation of Original application March 11, 1937, SerialNo.

Divided and this application August 11, 1939, Serial No. 289,522

7 v 11 Claims.

Our invention relates to sewing machines. More particularly, ourinvention is concerned with improvements to that type of sewing machinesemployed for stitching neckties, such for example as disclosed in ourPatent No. Re. 19,653, dated July 23, 1935, in which there is employed adouble pointed needle having its eye located between the points, theopposite ends of which, during the operation of the machine, arealternately grasped by the jaws of a pair of opposed needle barsarranged in alignment. I

One object of our invention is to provide a sewing machine of thecharacter described having improved means for automatically stopping theoperation of the machine after the complete stitching of each tie, sothat the eye of the needle will always be in proper alignment forthreading.

Other objects of this invention will in part be obvious and in parthereinafter pointed out.

Certain features shown and described but not claimed in this applicationare shown, described and claimed in' our copending application, SerialNo. 130,252, filed March 11, 1937, for Tie Stitching machines, of whichthe presentapplication is a division, and our copending application,Serial No. 289,523, filed August 11, 1939.

The invention accordingly consists in the features of construction,combinations of elements, and arrangement of parts which will beexemplified in the construction hereinafter described, and of which'thescope of application will be indicated in the following claims.

In the accompanying drawings, in which is shown one of the variouspossible embodiments of this invention,

Fig. 1 is a side elevational view, partly'sectional,

of a tie stitching machine-constructed in accord- I ance with ourinvention;

Fig. 2 is an end view, partly sectional, of that 7 portion of theapparatus shown in Fig. 1, illustrating our novel means forautomatically stop- Referring mdre particularly to Fig. 1 of thedrawings, we have disclosed a sewing machine of the class above referredto, in which there isemployed a double pointed needle 20 having its eyelocated between the points, and which is caused to be alternatelygrasped by upper, and lower needle bars 22 and 23, respectively, afterpiercing the fabrics of a necktie to efiectively sew a line of stitchingtherethrough. A pair of pivotally mounted rocker arms 25 and 26connected to the needle bars 22 and 23 by links 21, and

to a cam actuated plate 30 by means of links 29, cause synchronousoscillation of the said upper and lower needle bars to alternatelyclutch the needle 20 in the manner described in said Patent No. Re.19,653 and copending application Serial No. 32,148. I

In the operation of sewing machines 0 character herein described forstitching neckties.

where a separate thread of suitable length isemployed for stitching eachnecktie, it is necessary to rethread the needle after the completion ofthe stitching or each necktie. Since in actual manufacturing practice agreat many neckties are stitched on a single machine in one day, it ishighly desirable-that the threading oi the'needle after each tie hasbeenstitchedbe accomplished with a minimum expenditure of time and withgreat accuracy, lest the needle be broken in the threading operation.

By our invention we have provided novel means arranged so that when thesewing machine has completed the stitching of a tie and the said machineis thereupon automatically stopped, the

ping the operation of the machine after the stitching of a tie;

Fig. 3 is a cross-sectional view taken substantially on the line 33 ofFig. 2; r Fig. 4 is an enlarged cross-sectional view take substantiallyon the line 44 of Fig 3; and

Fig. 5 is a schematic wiring diagram illustrating the operation of ourinvention.

Referring now in detail to the drawings, we have disclosed an apparatusembodying our invention, such apparatus being of the type disclosed inour Patent No. Re. 19,653 and copending application Serial No. 32,148,filed July 19, 1935.

eye of the needlewill be in proper alignmentwith respect to the threader3|. The mechanism for automaticallycausing the machine to stop so thatthe eye of the needle 20 will be in such proper alignment ,will now bedescribed in detail.

In the drawings, there is shown a fly wheel fixed to a collar 6| forrotation therewith, said .collar Bl being freely rotatably mounted on afixed shaft 62 held' in a bracket 63 fixed to the frame F of the sewingmachine, in the manner shown and described in our said copendingapplication Serial No. 32,148. Also mounted on the collar 6| forrotation therewith is an annular cam 64, designed to actuate the rockerarms 25 and 26, as described in our said copending application. Suitablemeans are provided for driving said wheel 60 and cam 64, such as forexample a belt 65 connected to a motor pulley which is driven'by amotor, not here shown, but which is shown inour said copendingapplication.

By our invention we have devised a construc- 2 the 2 i I Y i l v tionwhereby, when the, current is 'turned on from a source of supply, themeans for operating the machine is held normally ineffective until a'hand switch is thrown, which automatically rendersthe machine operatingmeans effective for a predetermined period of time, such as for examplethe complete stitching of a tie, after 'which the said hand switch isautomatically opened to break the circuit to again render the machineoperating means ineffective. We have provided means for causing themachine to be stopped as in Figs. 2 and 3. The member 89 is pivoted to18 "is released, as hereinbefore described, the

above described, ,so that the eye of the needle will be in properalignment for threading. The

mechanism for carrying out the above will now be described. r

Mounted on the outer rim of the cam 64 is a fiat brake band 10 adaptedto be normally held in .call'y cause braking action of the band 19, the

frictional engagement with a portion of the said cam by having one end10a of said band pivotally attached to a suitably positioned fixedsupport 1| and the other end 1617 of said band being pivotally attachedto a rocker arm 12. The rocker arm.12 is pivotally mounted on a wall 13of the frame F by means of a fixed pivot 14, and is designed to normallyhold the band 10 in frictional engagement with the annular cam 64 toprevent rotation thereof, by means of a spring 15 having one end thereofattached to the free end of the rocker arm, and the other end thereofbeing fixed to a pin 16 on the wall 13.

To render the brake band 19 ineffective against the action of the spring15, there is provided a rod 11 attached at one end to an armature 18 bymeansof a link 19 (see Fig. 3), forming a part of a pivotally mountedmember 80, soon to be described. The rod 11 is pivoted to the link 19 at81, while the link 19 is in turn pivotally connected to the armature 18at 82. The other end of the rod 11 is adapted to pass through anaperture in a member 83 pivoted to the wall 13 at '84, said memberhaving an extended portion 83a which is adapted to contact the rockerarm 12. The rod 11 is provided with an enlarged head 85 adapted tohold.a spring 86 in confinement between said head 85 .and the portion 83a.The spring 86 is designed to slightly ofi'set the action of the spring15 and at the same time to prevent too rapid action of the brake band10. For releasing the brake band from its eifective position, as shownin Fig. 2 of the drawings, there is provided a solenoid 81, mounted onthe wall 13 and the lug 90 on the wheel 69 strikes the abutment whichwhen energized by closing a hand switch,

the needle bars 22 and 23, as described.

When, after the complete stitching of a tie, the solenoid 81 becomes(automatically bythe opening ofthe hand switch) deenergized, the spring15 will restore the rocker arm 12 to its normal position, such as shownin Fig. 2, to efiectively cause the band 16 to frictionally engage thecam 64. To insure that the upper needle bar 22 will receive the needle20 and that the said needle bar 22 will stop ina position whereby .theeye of the needle will be in proper alignment with the threader 3| thereis provided on the inner flat surface of the wheel a lug 99 which isadapted to abut against a specially designed abutment member .80,normally disposed in the, path of movement of said lug 90, as clearl shabutmentmember 88 will ,be swung out of the path of v the lug 90 topermit rotation of thewheel 60 and cam The tension of the brake band 19is such that when the solenoid 81 is deenergized to automaticam willstill rotate at a very low speed until member to cause the sewingmachine to come to a dead stop. The lug is so disposed that when themachine is thus caused to stop; as above described, the eye of theneedle will be in proper alignment to be pierced by the hook 32. Tominimize the shock of the meeting of the abutment member 89 with the lug90, the said member 86 is provided with a longitudinal opening (see'Fig.4) in the end thereof, into which there is slidably received a rod 96having a rounded end portion 91, which is adapted to strike the lug 90and which may be constructed of suitable resilient material. A spring 98housed within the opening 95 is adapted to resilient resist the inwardsliding movement of the rod 96 and thus absorb the shock when'the end 91strikes the lug 90. A pair of nuts 99 threaded on a reduced portion I66of rod 96 and disposed as shown is attached to the rod portion 96 andserves as a means for adjusting 'th'e'tension of the spring 98. I j

To limit the pivotal movement of the abutment member 80 toward the pathof the revolution of the lug 90, we have provideda stop member 80a onthe wall 13 (see Fig. 3) designed to cooperate withan adjustable setscrew 80b on the link 19.

In Fig. 5 of the drawings, we have shown a wiring diagram illustratingthe automatic action of the starting and stopping mechanism abovedescribed, and in which a switch S controlling current from a source ofsupply is shown in open position to break the circuit of current fromsaid source of supply. -When the switch S is closed to complete thecircuit from the source-of supply, the motor M for driving the wheel 60and cam 64 is not yet energized due to the open hand switch H, whichseparates the contacts I01 and lilla due to the action of the springI02, and thus renders the circuit to the motor M ineffective. The brakeband 19 is, therefore, held in frictional engagement with the cam 64,due to the action of the spring 15, and because of the abutment member80, which is shown diagrammatically as disposed in the path of the lug90. Also, there is shown the traveling work platform I93, adapted to bedriven through a chain of gears I04, I65, I06, the said gear I66 beingmounted on the same collar 6| as the cam 64 and wheel 66.

When it is desired to operate the machine for stitching a tie, the handswitch H is moved to the dotted line positionH', which closes thecontacts IM and "Na against the action of vthe spring I62, to completethe circuit through the solenoid 81 to energize the same, which thenattracts its armature 18 and releases the brake band 10 against theaction of the s rin 1 manner hereinbefore described. At the sametim.e,'the abutment member 80 is swung out of the path of the lug 90.The motor M, having been also simultaneously set in operation by theclosing of the switchH, drives the wheel 60 and cam 64 through the belt65 tooscillate the needle bars 22 and 23. The traveling work platformI03 1 is also simultaneously caused to travel by means of the gears I06,I05 and I 04, in the direction of the arrow, and the machine proceeds inits operation of stitching a tie.

After the work platform, carrying the assembled tie fabrics, hastraveled a distance sufficient to complete the stitching of a tie, thepin I01 will switching means for rendering'said last named meansineflective, said switching means being directly in the path of the lug90. The wheel 60 and cam 64 will rotate slowly due to the frictionalaction of the brake band 10 until the lug 90 strikes the member 80, tobring the machine to a dead'stop.

It will thus be seen that there is provided a device in which theseveral objects of this invention are achieved, and which is welladapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention,and as various changes might be made in the embodiments above set forth,it is to be understood that all matter herein set forth or shown in theaccompanying drawings is to be interpreted as illustrative and not in alimiting sense.

Having thus described our invention, we claim as new and desire tosecure' by Letters Patent:

1. In a sewing machine, the combination of alternately operating upperand lower needle bars, a double pointed needle having an eye locatedbetween the points, means for alternately connecting the needle witheach needle bar,

means for threading the needle, said last named means comprising a hookadapted to pass through the eye of the needle, a traveling work disposedin the path of travel of said platform and so positioned as to beactuatedby said plat- .format the end of its working travel, and meansfor causing said needle bars to come to rest at a predetermined positionwhen said driving means is rendered ineffective, said predeterminedpositionbeing'such that the said needle will be con-" nected to theupper needle bar, and such that the eye of the needle and the hook ofthe threading means will be in registered alignment for threading.

3. In a sewing machine, the combination of alternately operating upperand lower needle bars, a double pointed needle having an eye locatedbetween the points, means for alternately connecting the needle witheach needle bar, means for threading the needle, said last named meanscomprising a hook adapted to pass through the eye of the needle, atraveling work carrying platform, means to move said platformtransversely of the longitudinal axis of said needle, means for drivingsaid sewing machine to cause reciprocal movement of said needle bars,switching means for rendering said last named means ineffective, saidswitching means being disposed in the path of travel of said platformand so positioned as to be actuated by said platform at the end of itsworking travel, and means for causing said needle bars to come to restat a cause reciprocal movementof said needle bars,

switching means for rendering said last named means ineffective, saidswitching means being disposed in the path of travelof said platform andso positioned as to be actuated by said platform at the end of itsworking travel, and means for causing said 'needle bars to come to restat a predetermined position when said driving means is renderedineffective, said predetermined position being such that the said needlewill be connected to the upper needle bar.

2. In a sewing machine, the combination of alternately operating upperand lower needle bars, a double pointed needle having an eye locatedbetween the points, means for alternately connecting the needle witheach needle bar,

predetermined position when said driving means. is rendered ineffective,said predetermined position being such that the said needle will beconnected to the upper needle bar, said last named means comprisingbraking means, meansto actuate said' braking means when said drivingmeans is rendered ineffective, and positive stopping means which isprepared for operation when said braking means is actuated.

4. 'In a sewing machine, .the combination of I alternately operatingupper and lower needle bars, adouble pointed needle having an eyelocated between the Points, means for alternately connecting the needlewith each needle bar, means for threading the needle, said last namedmeans comprising a hook adapted to pass through the eye of the needle, atraveling work carrying platform, means to move said platformtransversely of the longitudinal axis of said needle, means for drivingsaid'sewing machine to cause reciprocal movement of said needle ,bars,switching means for rendering said last named means ineffective, saidswitching means being disposed in the path of travel of said platformand so positioned as to be actuated by said platform at the end of itsworking travel, and means for causing said needle bars to come to restata predetermined position when said driving means is renderedineffective, said predetermined position being such that the said needlewill be connected to the upper needle bar, said last named meanscomprising a brake, a solenoid, said solenoid and said brake being soconstructed and arranged that when said solenoid is energized said brakeis rendered ineffective, means to means for threading theneedle, saidlast named means comprising a hook adapted to pass through the eye ofthe needle, a traveling work carrying platform, means to move saidplatform transversely of the longitudinal axis of said needle, means fordriving said sewing machine to cause reciprocal movement of said needlebars,

de-energize said solenoid when said driving means is renderedineffective, and positive stopping means which is prepared for operationwhen said solenoid is de-energized. a

5. In a. sewing machine, the combinati n 'of alternately operating upperand lower needle bars, a double pointed needle'having an eye locatedbetween the points, means for alternately connecting the needle witheach needle. bar,

means for threading the needle, said last named means comprisinga hookadapted to pass through the'eye of the needle, a traveling'work carryingplatform, means to move'said platform transg versely of thelongitudinalaxis of j said needle, means for driving said sewing machin to cause;reciprocal movement of said needle bars, switch; ing means forrenderingfsaid last named means ineffective, said switching means beingdisposed in the path of; travel of said platform andso positioned as tobe actuated'by said platform at the end of its working travel, and meansfor causing said needle bars to come to rest at a predetermined positionwhen said driving means is rendered inefiective, said predeterminedposition being such that the said needle will be connected to the upperneedle bar, said last named means comprising a brake, a solenoid forcontrolling said brake, means to operate said solenoid so as to applysaid brake when said driving means is rendered ineffective, and positivestopping -tions between said motor and said source of curr nt supply,switch in saidelectrical connections, said switch being disposed in thepath of motor," a brake controlled by said solenoid, said means which isprepared for operation when said ing reciprocable movementof said needlebar, a

projectionon said wheel, a traveling work carrying platform, means formoving said platform, means for driving said wheel, switching means forrendering said last named means ineffective, said switching means beingdisposed in the path of travel of said platform and so'positioned as tobe actuated by said platform at the end of its working travel, and meansfor causing said needle bar to come to rest at a constant predeterminedposition when said driving means has been rendered ineffective, saidlast named means comprising a stop and means to position said stop inthep ath of travel of. the extension on said wheel.

7. In a sewing machine of the character described, the combination of aneedle bar, means comprising a rotatably mounted wheel for causingreciprocable movement of said needle bar, a

' projection on said wheel, a traveling work carrying platform, meansfor moving said platform,

means for driving said wheel, switching means for rendering said lastnamed means ineffective, said switching means being disposed in the pathof travel of said platform and so positioned as to be actuated by saidplatform at the end of its working travel, and means for causing saidneedle brake being'efiective 'to slow down said machine whensa'id switchisopenedby said platform, and means for causing said needle bar to cometo restat a predetermined position when said switch is opened, saidpredetermined position being such that said needle will be connected tothe upper needle bar, said last named means comprising positive stoppingmeans which is preparedfor operation when said switch is opened.

9; In a sewing machine of the character described, the combination ofalternately operating upper and lower needle bars, a doublejp intedneedle having'an eye located between the points, means for alternatelyactuating the needle with each needle bar, means for threading theneedle, said last named means comprising a hook adapt-- ed' to 'passthrough the eye of the needle, a traveling work carrying platform, meansto move said platform transversely of the longitudinal axis of saidneedle, means comprising a rotatably mounted wheel for causingreciprocable movement of said needle bars, said wheel having anextension, an electric motor for driving said wheel, a source of currentsupply for said electric motor, electrical connections between saidmotor and said source of current supply, a switch in bar to come to restat a constant predetermined position when said driving means has beenrendered ineffective, said last named means comprising braking means,means for actuating said braking means when said wheel driving means hasbeen rendered ineffective, a stop, and means for positioning said stopin the path of travel of the extension on said wheel.

4,8, In a sewing machine of the character described, the combination ofalternately operating ,upperv and lower needle bars, a double pointedineedlehaving an eye, located between the points, msansdor alternatelyactuating the needle with (eaohneedle-bar, means for threading theneedle, asaid; last. named means comprising a hook adapted ta-passthrough the eye of the needle, a travel- ;ing work carrying platform,means to move said platform transversely of the longitudinal axis ofsaid needle, and an electric motor for drivin said sewing machinetocause reciprocable movementof said needle'b'ars, a source sof currentsupply for said electric motor, electrical connecbe connected to theupper needle bar, said last named means comprising a stop and means toposition said stop in the path of travel of the extension on said wheel.

10. In a sewing machine of the character described, the combination ofalternately operating upper and lower needle bars, a double pointedneedle having an eye located between the points, means for alternatelyactuating the needle with each needle bar, means for threading theneedle, said last named means comprising a hook adapted to pass throughthe eye of the needle, a traveling work carrying platform, means to movesaid platform transversely of the longitudinal axis of said needle,means comprising a rotatably mounted wheel for causing reciprocablemovement of said 'needle bars, said wheel having an extension,anelectric motor for driving said wheel, a source of currentsupply forsaid electric motor, electrical connections between said motor and saidsource of current suppl a switch in said electrical connections, saidswitch being disposed in the path of travel of saidplatform and sopositioned as to be opened by said platform at the end of its workingtravel, a solenoid electrically connected to said motor, a brakecontrolled by said solenoid, said brake beingeifective to slow down saidmachine when saidswitch is opened by said platform, and means forcausing said needle bar to come to rest at a predeterminedv positionwhen said switch is opened, said predetermined position being such thatsaid needle will be connected to the upper needle bar, said last namedmeans comprising a stop and means actuated .by said solenoid to positionsaid stop in the path of travel of the extension on said wheel.

11. In a sewing machine of the character described, the combination ofalternately operating upper and lower needle bars, a double pointedneedle having an eye located between the points, means for alternatelyactuating the needle with each needle bar, means for threading theneedle, said last named means comprising a hook adapted to pass throughthe eye of the needle, a traveling work carrying platform, means to movesaid platform transversely of the longitudinal axis 0! said needle, andan electric motor for driving said sewing machine to cause. reciprocablemovement of said needle bars, a source of current supply for saidelectric motor, electrical connections between said motor and saidsource of current supply, a switch in said electrical conv said needlebar to come to rest at a predetermined nections, said switch beingdisposed in the path of travel of said platform and so positioned as tobe opened by said platform at the end of its position when said switchis opened, said predetermined position being such that said needle willbe connected to the upper needle bar, said last named means comprising astop actuable by said link for positioning in the path of travel of theextension on said wheel when the switch is opened RUDOLF' NAFTAH.VALENTINE NAFI'AH. HENRY" NAFIALI.

